testing/anbox: repair package

it was broken by the upgrade of lxc to 4.0.
7 jobs for !6550 with anbox-lxc3 in 3 minutes and 21 seconds (queued for 1 second)
latest detached
Status Job ID Name Coverage
  Lint
passed #88449
docker-alpine x86_64
lint

00:00:20

 
  Build
passed #88454
docker-alpine ci-build aarch64
build-aarch64

00:02:49

passed #88455
docker-alpine ci-build armv7
build-armv7

00:02:59

passed #88453
docker-alpine ci-build ppc64le
build-ppc64le

00:01:39

passed #88452
docker-alpine ci-build s390x
build-s390x

00:00:49

passed #88451
docker-alpine ci-build x86
build-x86

00:01:04

passed #88450
docker-alpine ci-build x86_64
build-x86_64

00:01:41